Coring and drilling device



J. T. PHIPPS 2,189,923

CORING AND DRILLING DEVICE Filed June 21, 1937 3 Sheets-Sheet 1 ATTORNEYFiled June 21, 1937 3 Sheet s-Sheet 2 INVENTORI 707$J ZIP/ukps,

ATTORNEY Patented Feb. '13, 1940 PATENT; OFFICE v v oonmomnnnmo nnvlcn'John T. Phipp Huntington Park, Calif., as-

signor to Herman 0. Application June 21,

.6 Claims.

This invention relates to coring and drilling devices, and particularlyto a type which may be used in conjunction with rotary apparatus.

An object of the invention is the provision of a coring device adapted,by its construction, to secure an accurate section of the formation,hard or soft, or both, without the necessity of withdrawing the drillpipe to secure the core.

An object of the invention is the provision of a coring device which maybe utilized in rotaryapparatus for the purpose of securing a core of theformation during operation of said rotary apparatus, and which core maybe readily withdrawn through the drill pipe, released from the coringdevice, and the coring device again passed through the drill pipe toadjacent the cutting elements to secure a further core of the formation.

Further objects include a coring and drilling device which permits alarge percentage of recovery of the core, in which the core is notrotated during drilling, wherein the parts of the invention are notsubject to being broken or distorted, which permits the securing of acore within a minimum of time and with safety, which is so constructedas to allow ready circulation of slush around the coring device andoutward through the bit in the usual manner, and which effectively holdsthe core to facilitate its recovery.

The invention has for a further object the provision of a coring devicewhich is simple of construction, inexpensive in cost of manufacture, andgenerally superior.

With the above mentioned and other objects in view, the inventionconsists in the novel and useful provision, formation, construction,asso ciation, and relative arrangement of parts, members and features,all as depicted in certain embodiments in the accompanying drawings; de-

scribed generally, and particularly pointed out in the claims.

In the drawings: Figure 1 is a fragmentary and partially verticallysectioned view of a portion of the coring device received within a drilland its associated members, the said drill being in the act of cuttingaway formation in the forming of a well hole,

Figure 2 is a fragmentary vertically sectioned view of the improvedcoring device and showing the position assumed thereby within rotarydrilling apparatus,

Figure 3 is a continuation of Figure 2 in vertical section,

Smith, Whittier, Calif.

1931, Serial No. 149,340

Figures 4, 5 and 6 are sectional views on the lines 4-4, 55, and 6-6 ofFigure 2,

Figure 7 is a fragmentary vertical sectional view showing certain of theparts of the invention in changed relationship from that shown in Figure2, and,

Figure 8 is a continuation of Figure '7.

Referring to the drawings, in Figure 1, I have shown at I a drillingdevice carrying at one end a bit for the purpose of cutting formation toprovide the well hole shown at 2. Within said rotary drilling device isconfined a coring device designated as an entirety by 3. This coringdevice is so arranged within the drilling device I that the same may beremoved therefrom when a sub 4 is engaged by a grab 5.

Referring to Figures 2 and 3, I have shown a sub l0 having threadedboxes H and II, the zone included between the threaded boxes beingprovided with a threaded area l3 of uniform diameter. The box l2 hasthreaded thereto a barrel 14. This barrel, which forms a part of therotary drilling device, is thickened in crosssection adjacent its endsat l5 and I6 so as to withstand stresses and likewise provide sufficientmaterial for the external threaded areas I! and I8 thereof. In thisrespect, it will be noted that the threads I! are in engagement with thethreads of the box l2. I9 is a drill collar provided with a threaded box20, the threads of which box are adapted for engagement with the threadsl8 of the barrel. The drill collar is formed at 2| with a threadedtapered pin and the bit body 22 is provided with a threaded box 23,whereby the bit body may be secured to the threads of the pin 2|. Thebit secured to the body may be of conventional form and, in the presentinstance, includes a crown type bit 24 and a fish tail typev 25. Thecrown type is provided with an inner tapered wall 26 within which isplaced segmental slips 2! together with a core catcher 28 secured tosaid slips. The core catcher includes an annulus 29 securing ends ofspaced-apart inwardly converging curved fingers 30. The body of the bithas two portions of different but uniform diameter, as shown 7 at 3| and32. Included between the outer surface of the bit body and the surfacedefined by 3| are water courses 33. Thus, a fluid passed through thebarrel I4 and collar 19 will likewise pass through the courses 33and-through the crown bit.

Adapted to be received within the drill structure just described is thecoring device. This includes a core barrel 50 externally threaded at 5!for co-engagement with the threaded area 82 of a collar 53. This collaris provided with an enlarged inwardly-directed flange $4 at one endthereof. Adapted to be supported upon the inner surface of the flange 56is a core catcher 58. This core catcher includes an annulus es havingsecured thereto on the inner surface thereof, spring flngers 51. Thesespring flngers converge at their free extremities. In order to supportthe collar 53, an annulus 58 provided at one end with anoutwardly-directed flange 59 and at its opposite end with aninwardlydlrected flange 80, is provided. The flange 68 may engage theflange 54 and act as a support for the collar 53 and core barrel 50during certain operation of the invention.

Included between the flange 59 and the body of the bit are bearings 6|.The opposite end of the core barrel 50 is internally threaded at 62 anda valve seat member 63 is provided with a threaded pin 64 for engagementwith the threads 82. The valve seat member is provided with a centralbore 65, the seat proper being shown at 56, and a ball valve 61 normallyrests upon said seat. The valve seat member also includes a cage 88.This cage, in the present instance, comprises a tube provided withspaced-apart slots, the slots being shown at 69. The cage is likewiseinternally threaded at I0, whereby it may have threaded engagement withthe threads ll of a race I2. The race I2 is formed with a central boreI3 and passed through said bore is a shank I4 of a second race I5. Theshank I4 is provided with a screw-threaded end IS in screw-threadedengagement with a partially threaded central bore ll of a third race I8.Interposed between the races I2 and I5 are bearings I9, and between theraces I2 and I8 are bearings 80. The third race I8 is provided with anexternally threaded area 8!, and threaded thereto is a tubular coupling82. This tubular coupling carries at its upper end 83 a jransverse plate84, and the plate in turn is provided with a diametrical slot 85, thecentral portion of which is concaved, as shown at 86 in Figure 5. Abovethe plate 84 are slips 8'! and 88, and said slips are so formed that theouter serrated surface thereof parallels the threaded area I3 of the subIll. The slips are both formed with tapered dove-tailed grooves 89.Headed bolts 90 are passed through the transverse slot 85 of the plateand are in threaded engagement with the slips, as illustrated at 9|Furthermore, both slips are provided with parallel sides, as shown bestin Figure 4, and by this construction afford ways for the passage offluid through the sub and into the barrel I4 (see Figure 4) The mandrel92 is provided with convergent oppositely-positioned dove-tails 93 and84 for reception within the dove-tail slots of the slips. This mandrelalso includes a shank 95. A stem 86, externally threaded at both ends,has the threads of one end received within a threaded bore of theconvergent end of the mandrel, as see Figure 2 at 91. The oppositethreaded end of the stem is secured within a screw-threaded hore of ahead 98.

pipe shown in Figure 1 at I00, and this rotation is imparted bythe-drill pipe to the drilling device and will cause the bit to engagethe formation and form the well-hole, During the forming of thewell-hole, mud-laden fluid is being pumped through the drill pipe andoutwardly around the bit as is the usual practice. The coring device,considered as an entirety, is within the drilling device, but the saidcoring device does not rotate during rotation of the drilling device. Inthis regard, it will be noted that when the parts of the invention arein the position illustrated in Figures 2 and 3, that rotation of thedrilling device will permit a core of the formation to pass through thecrown bit and upwardly within the core barrel 58. The core catchersshown at 30 and 55 will prevent retrograde movement of the core so thatthe core will at all times enter the core barrel and be held therein.When a given length of core, as defined by the length of the corebarrel, has been received therein, the coring device may be removed fromthe drilling device to the surface of the well by allowing the grab 5 tosecure the shank 95. When the grab is moved upwardly through the drillpipe, the mandrel will be moved to cause the slips 81 and 88 to travelalong the dove-tails of said mandrel, and release the-toothed engagementbetween said slips and the threads 53, as see Figure '7. When thisoccurs, the slips will approach and the headed screws will move withinthe slot 85. The head 98 will contact the heads of the screws, seeFigure I, and the core barrel will be lifted upon continued movement ofthe grab from the drilling device. The core catcher 55 will hold thecore within the core barrel. The member 58 which is in reality afloating ring, will remain within the bit body. After the core has beenremoved from the core barrel, the coring device may again be loweredthrough the drill pipe until such time as the core catcher, andparticularly the flanged end 5|, engages the flange 68 of the floatingring.-

Continued downward movement of the grab permits the mandrel 92 to movethe slips 81 and 88 into engagement with the threads I 3, and the deviceis again locked within the drilling device. This locking engagementbetween the slips and the sub is necessary, to the end that when a coreenters the core barrel, the barrel in turn is not forced upwardly by thecore.

As before stated, circulation is permitted through the drill pipe andbits, and excess mudladen material is permitted passage through thevalve 61 and outwardly through the openings 69' of the cage. Thus, themere fact that the coring device as an entirety is left within thedrilling device makes little difference because an accurate core may beobtained at any desired zone during a drilling operation through thesimple ex pedient of lowering the grab and removing the coring device inthe manner stated heretofore.

I claim:

1. In combination with rotary apparatus and its drill pipe, a subconnected to said drill pipe. a barrel carried by the sub, a drillsecured to said barrel, and the sub provided with an annular threadedarea of uniform diameter, of a coring device including a core barrelwithin said first named barrel, a swivel between said core barrel anddrill and adapted to support one end of said core barrel, a valve andits cage carried by the opposite end of the core barrel, slips forengaging the threads of said sub, means of connection between said slipsand cage including a second swivel, and a mandrel for actuating saidslips to move the same into engagement with the threads of said sub orout of engagement therewith, and whereby when said slips are inengagement with the teeth of said sub, the core barrel is held in oneposition within the first named barrel, and when the slips are moved bysaid mandrel to disengage the said threads, the said core barrel may beremoved from the first barrel.

2. A coring device including a core barrel, a valve and its cage securedto one end of said barrel, a race carried by the cage, a race providedwith a shank within the cage, and bearing members between the saidraces, said shank being passed through the first race, a third race, thesaid shank being secured thereto, and bearing members between said firstand third races, a tubular member secured to said third race andprovided with a cap formed with a longitudinal slot, slips above saidcap,,and means between said cap and said slips for securing said slipsto the cap and permitting movement thereof, and a mandrel formed forengagement with said slips to cause relative movement of said slips.

3. A coring device including a core barrel, a valve and its cage securedto one end of said barrel, a race carried by the cage, a race providedwith a shank within the cage, and bearing members between the saidraces, said shank being passed through the first race, a third race, thesaid shank being secured thereto, and bearing members between said firstand third races, a tubular member secured to said third race andprovided with a cap formed with a longitudinal slot, slips above saidcap, means between said cap and said slips for securing said slips tothe cap and permitting movement thereof, and a mandrel formed forengagement with said slips to cause relative movement of said slips,said mandrel provided with a stem and a head carried by said stem withinsaid tubular member secured to said third race, whereby when the mandrelis moved to one position, the said head engages the said means betweenthe cap and the slips.

4. The combination with rotary drilling apparatus, including aninternally threaded sub to be secured to drill pipe, a barrel secured tosaid sub, a bit, and a drill collar securing said barrel and said bit,of; a coring device within said drilling device, comprising a corebarrel, a core catcher secured at one end or said core barrel, a valveat the opposite end or said core barrel, said valve including a cage anda series of interconnected races having bearings, one of which races issecured to said cage, a tapered mandrel, slips within the threaded areaof the drill sub adapted to be actuated into engagement with saidthreads or out of engagement therewith dependent upon movement ofsaidmandrel, and means of connection between one of the races and saidslips; said slips when in engagement with said threads maintaining theremaining parts of said coring device in position within said drillingdevice, and when out of engagement with said threads permitting removalof said coring device from the drilling device.

disengagement of said lock members with the teeth of said sub; a cageswivelly secured to the lock members, and a core barrel depending at oneend from said cage, the opposite end of said core barrel terminatingadjacent the central opening of said bit, and a core catcher in said endof the barrel whereby when a core is cut by said bit, the same is passedthrough said central opening of the bit and into said core barrel, thecore barrel being held stationary by said core during rotation of saidbit due to the swivel mounting of said cage.

6. The combination with rotary drilling apparatus including aninternally threaded sub to be secured to the drill pipe, of a coringdevice within the drill pipe including a swivelled core barrel, atubular member secured to the top thereof provided with a cap formedwith a longltudinal slot, slips above said cap, means between said capand said slips for securing said slips to the cap and permittingmovement thereof, and a mandrel formed for engagement with said slips tocause relative movement of said slips for engagement or disengagementwith the internally threaded portion of the sub, said mandrel providedwith a stem and a head carried by said stem within the tubular memberthat is secured to the top of the core barrel whereby when the mandrelis moved to one position the said head engages the said means betweenthe cap and slips.

JOHN T. PBIPPS.

